Seattle-Tacoma International ⇄ Portland International SEA–PDX
Airlines flew 13,753 flights between Seattle-Tacoma International SEA in Seattle, WA and Portland International PDX in Portland, OR in the twelve months to July 2026, both directions together: 958,652 passengers in 1,239,964 seats, 77% of them filled, and 13,025,378 pounds of freight. 129 miles, about 31 minutes in the air, on 15 airlines: SkyWest Airlines Inc. (6,908), Horizon Air (3,356), Alaska Airlines Inc. (2,322), Delta Air Lines Inc. (596) and 11 more. Planning to fly it yourself? The weather and winds along this route right now.
Flights by month both directions
By month, as a table
| flights | |
|---|---|
| 1/25 | 1,238 |
| 2/25 | 1,110 |
| 3/25 | 1,202 |
| 4/25 | 1,184 |
| 5/25 | 1,279 |
| 6/25 | 1,311 |
| 7/25 | 1,378 |
| 8/25 | 1,334 |
| 9/25 | 1,209 |
| 10/25 | 1,207 |
| 11/25 | 1,082 |
| 12/25 | 1,095 |
| 1/26 | 1,016 |
| 2/26 | 922 |
| 3/26 | 1,110 |
| 4/26 | 1,146 |
| 5/26 | 1,174 |
| 6/26 | 1,194 |
| 7/26 | 1,264 |
Passengers by month
By month, as a table
| passengers | |
|---|---|
| 1/25 | 85,233 |
| 2/25 | 76,617 |
| 3/25 | 88,966 |
| 4/25 | 83,109 |
| 5/25 | 85,490 |
| 6/25 | 87,024 |
| 7/25 | 93,671 |
| 8/25 | 91,225 |
| 9/25 | 85,449 |
| 10/25 | 85,587 |
| 11/25 | 79,602 |
| 12/25 | 78,293 |
| 1/26 | 73,421 |
| 2/26 | 68,158 |
| 3/26 | 80,470 |
| 4/26 | 73,360 |
| 5/26 | 76,111 |
| 6/26 | 80,889 |
| 7/26 | 86,087 |
The airlines twelve months, both directions
| Airline | Flights | Passengers | Seats filled | Service |
|---|---|---|---|---|
| SkyWest Airlines Inc. OO | 6,908 | 395,278 | 78% | scheduled passenger service |
| Horizon Air QX | 3,356 | 214,203 | 84% | scheduled passenger service |
| Alaska Airlines Inc. AS | 2,322 | 299,720 | 77% | charter passenger service, scheduled passenger service |
| Delta Air Lines Inc. DL | 596 | 45,584 | 59% | charter passenger service, scheduled passenger service |
| ABX Air Inc ABX | 509 | 0 | scheduled cargo service | |
| Air Transport International 8C | 22 | 0 | charter cargo service | |
| American Airlines Inc. AA | 13 | 2,091 | 86% | scheduled passenger service |
| Sun Country Airlines d/b/a MN Airlines SY | 10 | 170 | 9% | charter passenger service |
| Southwest Airlines Co. WN | 6 | 932 | 92% | scheduled passenger service |
| Federal Express Corporation FX | 5 | 0 | scheduled cargo service | |
| Envoy Air MQ | 2 | 118 | 78% | scheduled passenger service |
| British Airways Plc BA | 1 | 248 | 97% | scheduled passenger service |
| Empire Airlines Inc. EM | 1 | 0 | scheduled cargo service | |
| Hawaiian Airlines Inc. HA | 1 | 141 | 47% | scheduled passenger service |
| United Air Lines Inc. UA | 1 | 167 | 93% | scheduled passenger service |
The aircraft as the airlines report their types
| Aircraft | Flights | Seats a flight | Passengers |
|---|---|---|---|
| Embraer ERJ-175 | 10,261 | 75 | 609,599 |
| Boeing 737-800 | 935 | 160 | 107,490 |
| Boeing 737-900ER | 740 | 178 | 99,146 |
| Boeing B737 Max 900 | 592 | 178 | 79,546 |
| Boeing 767-300/300ER | 359 | 0 | 0 |
| A200-100 BD-500-1A10 | 275 | 109 | 20,327 |
| Boeing 767-200/ER/EM | 174 | 0 | 0 |
| Boeing B737 Max 800 | 166 | 161 | 20,749 |
| Boeing 737-700/700LR/Max 7 | 114 | 124 | 11,593 |
| A220-300 BD-500-1A11 | 90 | 130 | 6,862 |
| Boeing 757-200 | 20 | 78 | 405 |
| Airbus Industrie A321-200n | 10 | 194 | 1,606 |
| Airbus Industrie A321Neoxlr | 5 | 190 | 778 |
| Canadair RJ-700 | 5 | 65 | 0 |
| Cessna 208 Caravan | 2 | 0 | 0 |
| Boeing 737-900 | 1 | 178 | 162 |
| Airbus Industrie A300-600/R/CF/RCF | 1 | 0 | 0 |
| McDonnell Douglas MD-11 | 1 | 0 | 0 |
| Boeing 787-10 Dreamliner | 1 | 256 | 248 |
| B787-900 Dreamliner | 1 | 300 | 141 |
SEA → PDX this direction alone · flown January 2025 to July 2026
6,883 flights of 6,848 scheduled, 470,416 passengers in 619,285 seats, 7,484,803 pounds of freight, 17,812 pounds of mail. SkyWest Airlines Inc. 3,388; Horizon Air 1,744; Alaska Airlines Inc. 1,161; Delta Air Lines Inc. 295; ABX Air Inc 260; Air Transport International 16; American Airlines Inc. 12; Sun Country Airlines d/b/a MN Airlines 4; Southwest Airlines Co. 2; Federal Express Corporation 1.
PDX → SEA this direction alone · flown January 2025 to July 2026
6,870 flights of 6,856 scheduled, 488,236 passengers in 620,679 seats, 5,540,575 pounds of freight, 76,978 pounds of mail. SkyWest Airlines Inc. 3,520; Horizon Air 1,612; Alaska Airlines Inc. 1,161; Delta Air Lines Inc. 301; ABX Air Inc 249; Air Transport International 6; Sun Country Airlines d/b/a MN Airlines 6; Federal Express Corporation 4; Southwest Airlines Co. 4; Envoy Air 2; American Airlines Inc. 1; British Airways Plc 1; Empire Airlines Inc. 1; Hawaiian Airlines Inc. 1; United Air Lines Inc. 1.
Source: the Bureau of Transportation Statistics' T-100 Segment table (all carriers). A flight is one departure performed on this segment; seats and passengers are the airlines' own monthly reports; "seats filled" is passengers divided by seats. The miles are the DOT's great-circle distance. Both ends: Seattle-Tacoma International SEA and Portland International PDX; all routes.